MD S-2

Sulphur content in diesel oil should not be more than .......
a)0.10%
b) 1%
c) 0.01%
d) 5%

In two stroke engine, the working cycle is completed in ......
a)One revolution of the crankshaft
b) Two revolutions of the crankshaft
c) Three revolutions of the crankshaft
d) Four revolutions of the crankshaft

Theoretically a four stroke cycle engine should develop ........... power as that of a two stroke cycle engine,
a) Half
b) Same
c) Double
d) Four times

Due to turbo charger, air intake in a engine ........
a)Decreases
b) Increases
c) Remains same
d) No change

In diesel engine the fuel is injected into the cylinder when the piston is .........
a)Exactly at T.D.C after exhaust stroke
b) Exactly at B.D.C before compression stroke
c) Nearing T.D.C during compression stroke
d) Approaching T.D.C during exhaust stroke

The motion of the cam is transferred to the valve through ...........
a)Valve stems
b) Camshaft pulley
c) Rocker arms
d) Piston

The function of an alternator in an automobile is to .......
a)Continually recharge the battery
b) Partly convert engine power into electric power
c) Supply electric power
d) Convert mechanical energy into electrical energy

The firing order for an inline four Cylinder l.c engine is ........
a) 1-2-4-3b) 1-3-4-2c) 1-2-3-4d) 1-3-2-4

The odometer is an instrument used for measurement of ........
a) Power
b) Fuel consumption
c) Engine rpm
d) Distance

The connecting rod lower end is connected to the relevant ........... of crankshaft.
a) Big end
b) Crank arm
c) Journal
d) Small end

The diagram which shows the correct crank positions corresponding to the opening and closing of the valve is known as .............
a)Indicator diagram
b) Acid force diagram
c) Valve timing diagram
d) None of these

The purpose of a thermostat in an engine cooling system is to .....
a) Prevent the cooling from boiling
b) Allow the engine to warm up quickly
c) Indicate the coolant temperature
d) Pressurise the system to raise the boiling point

The information provided by the oxygen sensor to the feedback control system is about the .........
a)Air fuel ratio
b) Air temperature
c) Air flow speed
d) Exhaust gas volume

The starting system includes ......
a)A battery, a starter and an ignition switch
b)A battery, a distributor and an ignition switch
c) A battery, a starter and a distributor
d) A distributor, a starter and an ignition switch

The function of a connecting rod is .......
a) To turn the fly wheel
b) To drive the drive plate
c) To drive the fuel pump
d) To transmit motion of the piston to the crankshaft

The basic part of the engine to which the other engine p ts are attached or assembled is the .......
a) Cylinder head
b) Cranksh
c) Cylinder block
d) Oil pan

The cam shaft in an engine is always mounted ........
a)Parallel to the crankshaft
b) Perpendicular to the crankshaft
c) Inclined to the crankshaft
d) None of these

In a diesel engine, the function of a fuel injector is to ..........
a)Mix the fuel and air
b) Ignite the air- fuel mixture
c) Provide flame front for ignition
d) Spray atomized fuel in the cylinder

One effect of detonation is .....
a)Delay in ignition
b) Loss of power
c) Overheating of an engine
d) Overcooling of an engineThe engine oil is stored in ............. when the engine is not running.
a)Oil pan
b) Cylinder head
c) Oil pump
d) Separate oil tank

Which part does not rotate in the engine?
a)Piston
b) Crankshaft
c) Cylinder head
d) All of these

In the charging system of an Alternator, which of the following is used to convert AC to DC.
a) Slip rings
b) Diodes
c) Regulator
d) Starter

The condition that results in large quantities of carbon monoxide emission is ........
a)Insufficient air during combustion
b) Insufficient fuel during combustion
c) Low temperature combustion
d) High temperature combusting

In a car which of the following bulb will have the least wattage?
a) Head light bulb
b) Stop light bulb
c) Parking light bulb
d) Ignition warning bulb

The function of distributor in an automobile is to .......
a)Distribute charge equally to all the cylinder
b) Regulate power
c) Feed lub oil to all moving parts
d) Time the spark

In the opposed piston diesel engine, the combustion chamber is located ........
a)Above the piston
b) Below the piston
c) Between the piston
d) Anywhere

Which of the following is not a part of common rail diesel injection system?
a)Sensor
b) Injector
c) Air cleaner
d) Actuator

The knocking in diesel engines may be prevented by .........
a)Reducing the delay period
b) Raising the compression ratio
c) Increasing the inlet pressure of air
d) All of these

In which working cycle is completed in four stroke engine?
a)One revolution of the crankshaft
b) Two revolution of the crankshaft
c) Three revolution of the crankshaft
d) Four revolution of the crankshaft

In which parts are to be joined between cylinder head and engine block?
a)Valve guide
b) Compressor ring
c) Combustion chamber
d) Head gasket

A two stroke cycle engine gives the number of power strokes as compared to the four stroke cycle engine at the same engine speed.
a)Half
b) Same
c) Double
d) Four times

A two stroke cycle engine gives mechanical efficiency than a four stroke cycle engine-
a)Higher
b) Inwer
c) Same
d) None of these

After fitting rings over piston, it is inserted in cylinder with the help of a special tool called-
a) Ring Expander
b) Ring cleaner
c) Ring compressor
d) Ring groove cleaner

Compression ratio of diesel engine is- -
a)The ratio of volumes of air in cylinder before compression stroke and after compression stroke
b)Volume displaced by piston per stroke and clearance volume in cylinder
c)Swept volume/Cylinder volume
d)Cylinder volume/Swept volume
The main function of intake manifold is
a)Reduce intake noise
b)Provide the mixture of air and fuel
c)Distribute intake air equally to the cylinder
d)Cools the intake air to a suitable temperature

The heat transfer from coolant to air in radiator of an automobile engine take place by-
a)Radiation only
b) Convention only
c) Convention & Radiation only
d) Conduction, Convention & Radiation

Water circulation in a radiator take place from
a)Lower tank to upper tank
b) Upper to lower tank
c) Engine to upper tank
d) Engine to water pump

Supercharger is the function of-
a)Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere
b)Providing forced cooling air
c)Supplying compressed air to remove combustion products only
d) Injecting excess fuel for raising more load

Preferred location of an oil cooler is-
a) Before the filters
b) After the filters
c) Between the filters
d) Anywhere

High sulphur content in diesel oil used for diesel engines lead to-
a)Production of highly corrosive gases corroding the cylinder walls and exhaust system
b)Excessive engine wear
c)Damaging of both the storage tank and the engine
d)Reduction in thermal efficiency

Starter Motor, the engine crankshaft must be rotated at a speed of 100 rpm to start the engine. What is possible cause of the pinion disengages slowly after starting?
a) Weak battery
b) Over running clutch defective
c) Open in control circuit
d) Open circuit in commutator

The Firing order in an l.c Engine depend upon -
a)Arrangement of cylinder
b) Design of crankshaft
c) Noe of cylinder
d) All of these

Which component convert up & down motion in to rotary motion of piston is called
a) Camshaft
b) Crankshaft
c) Connecting rod
d) Piston rings

When air transmit to engine by turbo charger, what will happen?
a)Transmit exhaust gases
b) Transmit increased air pressure
c) Make Vacuum
d) Less air pressure

The impeller type exhauster has
a) One spindle
b) Two spindle
c) Three spindle
d) No spindle

In engine specification it is given that cubic capacity is engine's
a) 'Lubricating oil capacity is 1.6 lit.
b) One cylinder total volume is 1.6 lit.
c) All cylinders sweep volume 1.6 lit.
d) Cooling water circulation per minute is 1.6 lit.